Glenn D. Hibbard | BSc (Alberta), PhD (Toronto), PEng
Professor, Chair & Canada Research Chair, Comparative Multi-Scale Dynamics (Tier II)
Office: WB 140
Research Group: Cellular Hybrid Materials Research Group
New regions of material property space can be accessed by combining microstructural design at the nm-scale, with architectural design at the μm- or mm-scale. For example, the large strength increase associated with grain size reduction to below 50 nm has driven global research efforts into the development of nanocrystalline materials. For many potential structural applications, however, the density of a nanocrystalline material is just as important as its strength. In fact, reducing the density is more important than increasing the strength for certain weight specific materials performance indices and is especially critical for applying structural nanomaterials in the aerospace and automotive sectors.
We are developing a new class of structural nanomaterial where in the effective density of the parent metal is reduced by more than an order of magnitude by incorporating a periodic cellular architecture of open space. In one example a low density cellular nanocrystalline material was created by electroforming nanocrystalline Ni around a rapid prototyped acrylic photopolymer micro-truss. This new hybrid material combined the structural efficiency of micro-truss architectures with the ultra-high strength that can be achieved by grain size reduction to the nm-scale.
Electrodeposited nanocrystalline material can also be used to reinforce conventional metallic micro-truss materials, creating metal/metal cellular hybrids. This approach is particularly effective because the ultra-high strength material is optimally located at the furthest distance from the neutral bending axis of the constituent micro-truss struts. The mechanical performance of these new hybrids is controlled by the interconnected network of nanocrystalline tubes.
Link to publications
- C. Moes and G.D. Hibbard, “Development of Melt-Stretching Technique for Manufacturing Fully-Recyclable Thermoplastic Honeycombs with Tunable Cell Geometries”, Materials & Design, 141 (2018) 67.
- B. Yu, K.H. Chien, K. Abu Samk, G.D. Hibbard, “A Mechanism for Energy Absorption: Sequential Micro-kinking in Ceramic Reinforced Aluminum Alloy Lattices during Out-of-Plane Compression”, Materials Science and Engineering A, 716 (2018) 11.
- M. Hostetter and G.D. Hibbard, “Post-Peak Collapse and Energy Absorption in Melt-Stretched Stochastic Honeycombs”, Journal of Materials Science, 51 (2016) 3318-3328.
- M. Daly, J.L. McCrea, B.A. Bouwhuis, C.V. Singh, and G.D. Hibbard, “Deformation Behavior of a Co-Ni Multilayer with a Modulated Grain Size Distribution”, Materials Science and Engineering A, 641 (2015) 305-314.
- A. Lausic, A. Bird, C.S. Steeves, and G.D. Hibbard, “Scale-Dependent Failure of Stereolithographic Polymer Microtrusses in Three-Point Bending”, Journal of Composite Materials (2015) DOI: 10.1177/0021998315596369
- E. Bele, C. Singh, and G. D. Hibbard, “Failure Mechanisms in Thin-Walled Nanocrystalline Cylinders Under Uniaxial Compression” Acta Materialia, 86 (2015) 157-168.
- M. Hostetter, andG.D. Hibbard, “Architecture-Process Relationships in Stochastic Honeycombs, Journal of Applied Polymer Science, (2015) DOI: 10.1002/app.42174.
- K. A. Samk, B. Yu, and G.D. Hibbard, “Optimizing the Compressive Strength of Strain- Hardenable Stretch-Formed Microtruss Architectures”, Metallurgical and Materials Transactions A, 46 (2015) 1985-1994.
- M. Hostetter, and G.D. Hibbard “Modeling the Buckling Strength of Polypropylene Stochastic Honeycombs”, Journal of Materials Science, 49 (2014) 8365-8372.
- A. Lausic, C. Steeves, and G.D. Hibbard, “The Effect of Grain Size on the Optimal Architecture of Electrodeposited Metal/Polymer Microtrusses”, Journal of Sandwich Structures and Materials, 16 (2014) 251-271.
- M. Hostetter, and G.D. Hibbard “Architectural Characteristics of Stochastic Honeycombs Fabricated from Varying Melt Strength Polypropylenes”, Journal of Applied Polymer Science, 131 (2014) 40074.
- Professor Zheng-Hong Lu and Professor Glenn Hibbard (MSE) are two of seven Engineering faculty named Canada Research Chairs
- Bird wing-inspired design lends to next-generation structural panel technology
- Cellular hybrid materials researcher named latest Canada Research Chair
- Materials industry partnerships receive federal government funding
- MSE professor recognized for teaching excellence in early-career
MSE296: Materials Paradigm at a Glance I
MSE297: Materials Paradigm at a Glance II
MSE318: Phase Transformations
- Instructor of the Year, Impact Student Choice Awards, Department of Materials Science & Engineering, U of T, 2018
- Instructor of the Year, Impact Student Choice Awards, Department of Materials Science & Engineering, U of T, 2014
- Early Career Teaching Award, Faculty of Applied Science & Engineering, U of T, 2010
- University of Toronto Engineering Society Teaching Award, 2007